Single-shot production of Janus graphene thin film for solar steam generation with 94.5% efficiency

Yang, T; Lin, H; Lin, KT; Mesa Saldarriaga, D; Yang, G; Guo, C; Zhang, H; Zhang, J; Fraser, S; Lau, AKT; Ma, T; Jia, B

Single-shot production of Janus graphene thin film for solar steam generation with 94.5% efficiency

Yang, T

Lin, H Lin, KT Mesa Saldarriaga, D Yang, G Guo, C Zhang, H Zhang, J Fraser, S Lau, AKT Ma, T Jia, B

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Carbon, 2022, 199, pp. 469-478
Issue Date:: 2022-10-31

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Field	Value	Language
dc.contributor.author	Yang, T https://orcid.org/0000-0002-8683-2072
dc.contributor.author	Lin, H
dc.contributor.author	Lin, KT
dc.contributor.author	Mesa Saldarriaga, D
dc.contributor.author	Yang, G
dc.contributor.author	Guo, C
dc.contributor.author	Zhang, H
dc.contributor.author	Zhang, J
dc.contributor.author	Fraser, S
dc.contributor.author	Lau, AKT
dc.contributor.author	Ma, T
dc.contributor.author	Jia, B
dc.date.accessioned	2023-07-09T21:11:49Z
dc.date.available	2023-07-09T21:11:49Z
dc.date.issued	2022-10-31
dc.identifier.citation	Carbon, 2022, 199, pp. 469-478
dc.identifier.issn	0008-6223
dc.identifier.uri	http://hdl.handle.net/10453/171377
dc.description.abstract	Interfacial solar-driven steam generation as a cost-effective green technology has shown a great potential in realizing water desalination and purification. To achieve high solar steam generation efficiency, it is important to simultaneously realize high solar absorption and effective water transportation. Among various solar absorbers, Janus structures composed of different layered materials for multiple functions have been demonstrated to be promising for high efficiency. However, the complex material composition and the corresponding multistep fabrication process become a barrier for high efficiency realization and large-scale applications. Developing a simple, low-cost, and fast fabrication process holds the key to producing Janus absorbers with high efficiency. Herein, we propose and demonstrate a monolithic Janus absorber fabricated by a single shot flash reduction of an ultrathin (370 nm) graphene oxide film within a millisecond time frame. By synchronising the advantages of a top three-dimensional (3D) porous graphene structure for high solar absorption (99%) and a bottom two-dimensional (2D) layered graphene oxide structure for efficient water transportation, the fabricated Janus absorber achieves high solar-to-vapour conversion efficiency of 94.5% under one sun illumination and steady water production (2.054 kg m−2 h−1). Such a large-scale high yield production method is orders of magnitude faster than the state-of-the-art Janus film fabrication method and offers a highly efficient and reliable approach for solar water desalination and purification.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Carbon
dc.relation.isbasedon	10.1016/j.carbon.2022.07.030
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Nanoscience & Nanotechnology
dc.subject.classification	34 Chemical sciences
dc.subject.classification	40 Engineering
dc.subject.classification	51 Physical sciences
dc.title	Single-shot production of Janus graphene thin film for solar steam generation with 94.5% efficiency
dc.type	Journal Article
utslib.citation.volume	199
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2023-07-09T21:11:44Z
pubs.publication-status	Published
pubs.volume	199

Abstract:

Interfacial solar-driven steam generation as a cost-effective green technology has shown a great potential in realizing water desalination and purification. To achieve high solar steam generation efficiency, it is important to simultaneously realize high solar absorption and effective water transportation. Among various solar absorbers, Janus structures composed of different layered materials for multiple functions have been demonstrated to be promising for high efficiency. However, the complex material composition and the corresponding multistep fabrication process become a barrier for high efficiency realization and large-scale applications. Developing a simple, low-cost, and fast fabrication process holds the key to producing Janus absorbers with high efficiency. Herein, we propose and demonstrate a monolithic Janus absorber fabricated by a single shot flash reduction of an ultrathin (370 nm) graphene oxide film within a millisecond time frame. By synchronising the advantages of a top three-dimensional (3D) porous graphene structure for high solar absorption (99%) and a bottom two-dimensional (2D) layered graphene oxide structure for efficient water transportation, the fabricated Janus absorber achieves high solar-to-vapour conversion efficiency of 94.5% under one sun illumination and steady water production (2.054 kg m−2 h−1). Such a large-scale high yield production method is orders of magnitude faster than the state-of-the-art Janus film fabrication method and offers a highly efficient and reliable approach for solar water desalination and purification.

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http://hdl.handle.net/10453/171377